One of the four people killed at Dreamworld on Australia's Gold Coast was a New Zealander, officials have confirmed.

The Ministry of Foreign Affairs and Trade said Queensland Police had advised the ministry of the victim's nationality.

The 42-year-old woman was believed to be a long-term resident of Australia, the ministry said.

It would not release the woman's name, saying that was the responsibility of Queensland Police.

Earlier, the ministry had said it was not aware that any New Zealanders had been involved.

Two of the four adult victims of yesterday's Gold Coast tragedy were tipped off the Thunder River Rapids Ride when one of the rafts apparently careered into another, and the other two were trapped inside.